Linear and exponential growth - Harder

This video is for the redesigned SAT which is for you if you are taking the SAT in March 2016 and beyond.

Linear and exponential growth - Harder example
From 1925 to 2014, the United States corn yield, measured in bushels per acre (bu/A), grew approximately 2.41% per year. By contrast, during the same time period, soybean yield grew by approximately 3.5 bushels per acre (bu/A) every 10 years. A NASS survey showed that in 1959, the corn yield was 51.2 bu/A and the soybean yield was 23.5 bu/A. Based on the information above, which of the following is the best estimate for the difference between corn yield and soybean yield in 1974?

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